BR0000988A - Medoto to operate a wireless spread-spectrum multiple access system based on orthogonal frequency division multiplexing - Google Patents

Medoto to operate a wireless spread-spectrum multiple access system based on orthogonal frequency division multiplexing

Info

Publication number
BR0000988A
BR0000988A BR0000988-1A BR0000988A BR0000988A BR 0000988 A BR0000988 A BR 0000988A BR 0000988 A BR0000988 A BR 0000988A BR 0000988 A BR0000988 A BR 0000988A
Authority
BR
Brazil
Prior art keywords
delta
adjacent
base station
cell
offset
Prior art date
Application number
BR0000988-1A
Other languages
Portuguese (pt)
Inventor
Rajiv Laroia
Junyi Li
Michaela C Vanderveen
Original Assignee
Lucent Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR0000988A publication Critical patent/BR0000988A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H04L5/026—Multiplexing of multicarrier modulation signals using code division
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H04B7/2634—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for channel frequency control

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Feedback Control In General (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

An orthogonal frequency division multiplexing (OFDM) based spread spectrum multiple access system using offsetting between cells, and in particular, the use of tone offsetting and time offsetting, is disclosed. More specifically, frequencies that define the tone set of one cell is offset from the frequencies that define the tone set of at least one adjacent cell. In other words, if a first base station is using tones F1, F2, ..., FN within a frequency band, then a second base station adjacent to the first base station uses tones F1+ DELTA f, F2+ DELTA f ..., FN+ DELTA f within the same frequency band. Furthermore, the symbol timing of the base-station of one cell may be offset from the symbol timing of the base-station of an adjacent cell. Thus, if a first base station starts successive symbols at times T1, T2, and T3, then a second base station adjacent to the first base station starts its respective corresponding successive symbols at times T1+ DELTA t, T2+ DELTA t, and T3+ DELTA t. For example, in a cellular system with hexagonally shaped cells, the tone sets of two adjacent cells are offset by 1/3 of the spacing between adjacent tones, and the symbol timings of two adjacent cells are offset by 1/3 of a symbol period. Advantageously, the intercell interference is more uniformly distributed among users in a cell. <IMAGE>
BR0000988-1A 1999-03-11 2000-03-01 Medoto to operate a wireless spread-spectrum multiple access system based on orthogonal frequency division multiplexing BR0000988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/266,370 US6711120B1 (en) 1999-03-11 1999-03-11 Orthogonal frequency division multiplexing based spread spectrum multiple access

Publications (1)

Publication Number Publication Date
BR0000988A true BR0000988A (en) 2000-10-17

Family

ID=23014287

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0000988-1A BR0000988A (en) 1999-03-11 2000-03-01 Medoto to operate a wireless spread-spectrum multiple access system based on orthogonal frequency division multiplexing

Country Status (12)

Country Link
US (1) US6711120B1 (en)
EP (1) EP1039684B1 (en)
JP (1) JP3703003B2 (en)
KR (1) KR100804854B1 (en)
CN (1) CN1235358C (en)
AT (1) ATE230533T1 (en)
AU (1) AU770983B2 (en)
BR (1) BR0000988A (en)
CA (1) CA2298361C (en)
DE (1) DE60001081T2 (en)
ES (1) ES2189725T3 (en)
ID (1) ID26302A (en)

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US7388845B2 (en) * 2002-08-26 2008-06-17 Qualcomm Incorporated Multiple access wireless communications system using a multisector configuration
US7133354B2 (en) * 2002-08-26 2006-11-07 Qualcomm Incorporated Synchronization techniques for a wireless system
US6985498B2 (en) * 2002-08-26 2006-01-10 Flarion Technologies, Inc. Beacon signaling in a wireless system
US7366200B2 (en) * 2002-08-26 2008-04-29 Qualcomm Incorporated Beacon signaling in a wireless system
US7068703B2 (en) * 2003-02-18 2006-06-27 Qualcomm, Incorporated Frequency hop sequences for multi-band communication systems
US6999467B2 (en) * 2003-07-28 2006-02-14 Motorola, Inc. Method and apparatus for transmission and reception within an OFDM communication system
US7542722B2 (en) * 2003-12-19 2009-06-02 Telefonaktiebolaget Lm Ercisson (Publ) Method and arrangement for minimizing intracell interference in a data transmission system
US7395495B2 (en) * 2004-01-12 2008-07-01 Intel Corporation Method and apparatus for decoding forward error correction codes
US7864725B2 (en) 2004-01-29 2011-01-04 Neocific, Inc. Methods and apparatus for overlaying multi-carrier and direct sequence spread spectrum signals in a broadband wireless communication system
KR100713528B1 (en) * 2004-03-12 2007-05-02 삼성전자주식회사 Apparatus and method for transmitting sub-channel signal in a communication system using orthogonal frequency division multiple access scheme
KR100739511B1 (en) * 2004-06-25 2007-07-13 삼성전자주식회사 Apparatus and method for transmitting/receiving pilot signal in a communication system using orthogonal frequency division multiplexing scheme
KR100640581B1 (en) * 2004-07-02 2006-10-31 삼성전자주식회사 OFDMA system and method for controlling frequency offsets of subscribers at uplink communication
US7263335B2 (en) * 2004-07-19 2007-08-28 Purewave Networks, Inc. Multi-connection, non-simultaneous frequency diversity in radio communication systems
US7379446B2 (en) * 2004-10-14 2008-05-27 Qualcomm Incorporated Enhanced beacon signaling method and apparatus
US7715845B2 (en) 2004-10-14 2010-05-11 Qualcomm Incorporated Tone hopping methods and apparatus
US7489983B2 (en) * 2004-11-03 2009-02-10 Emhart Glass S.A. Control for an I.S. machine
KR100635013B1 (en) * 2004-12-03 2006-10-16 한국전자통신연구원 Synchronous orthogonal frequency division multiplexing receiving apparatus in multiple cell circumstance and method thereof
KR100612045B1 (en) * 2004-12-08 2006-08-14 한국전자통신연구원 Method for controlling base station to suppress inter-cell interference
KR100709691B1 (en) * 2004-12-08 2007-04-19 한국전자통신연구원 Transmitter and frquency hopping method of the same
WO2006062355A1 (en) * 2004-12-08 2006-06-15 Electronics And Telecommunications Research Institute Transmitter and frequency hopping method of the same
US8537760B2 (en) * 2004-12-17 2013-09-17 Samsung Electronics Co., Ltd Method and system for dynamic hybrid multiple access in an OFDM-based wireless network
US8351405B2 (en) * 2006-07-14 2013-01-08 Qualcomm Incorporated Method and apparatus for signaling beacons in a communication system
CN101047683B (en) * 2006-05-16 2011-06-15 华为技术有限公司 Radio signal transmitting/receiving method and transmitting/receiving device
KR101138164B1 (en) * 2006-12-28 2012-04-23 후지쯔 가부시끼가이샤 Transmitting device and receiving device in cellular system
RU2446586C2 (en) * 2006-12-28 2012-03-27 Фудзицу Лимитед Transmitter and receiver in cellular communications system
US20090080377A1 (en) * 2007-09-24 2009-03-26 Nec Laboratories America, Inc. Distributed Channel Management Based on Channel Hopping in Uncoordinated 802.11 Based WLAN
US8811339B2 (en) 2008-07-07 2014-08-19 Blackberry Limited Handover schemes for wireless systems
WO2010054693A1 (en) * 2008-11-14 2010-05-20 Nokia Siemens Networks Oy Controlling cellular communication resources
CN101932140A (en) * 2009-06-22 2010-12-29 华为技术有限公司 Method and base station for adjusting radio frame sending time
US8995539B2 (en) * 2010-07-13 2015-03-31 Qualcomm Incorporated Methods and apparatus for selecting and using communications resources in a communication system
US8582527B2 (en) 2011-07-01 2013-11-12 Ofinno Technologies, Llc Hybrid automatic repeat request in multicarrier systems
US8369280B2 (en) 2011-07-01 2013-02-05 Ofinno Techologies, LLC Control channels in multicarrier OFDM transmission
WO2013006379A1 (en) 2011-07-01 2013-01-10 Dinan Esmael Hejazi Synchronization signal and control messages in multicarrier ofdm
US8446844B1 (en) 2011-12-04 2013-05-21 Ofinno Technologies, Llc Handover in multicarrier wireless networks
US9497756B2 (en) 2012-03-25 2016-11-15 Comcast Cable Communications, Llc Base station radio resource management
US9949265B2 (en) 2012-05-04 2018-04-17 Comcast Cable Communications, Llc Control channel in a wireless communication system
JP7351787B2 (en) 2020-04-01 2023-09-27 株式会社スマート・ソリューション・テクノロジー Communication devices, communication methods and programs

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US5410538A (en) 1993-11-09 1995-04-25 At&T Corp. Method and apparatus for transmitting signals in a multi-tone code division multiple access communication system
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Also Published As

Publication number Publication date
CN1235358C (en) 2006-01-04
US6711120B1 (en) 2004-03-23
KR100804854B1 (en) 2008-02-20
AU1956600A (en) 2000-09-14
ATE230533T1 (en) 2003-01-15
ES2189725T3 (en) 2003-07-16
EP1039684B1 (en) 2003-01-02
CA2298361C (en) 2005-06-07
EP1039684A1 (en) 2000-09-27
ID26302A (en) 2000-12-14
DE60001081T2 (en) 2003-10-09
DE60001081D1 (en) 2003-02-06
KR20000062825A (en) 2000-10-25
CA2298361A1 (en) 2000-09-11
CN1267151A (en) 2000-09-20
JP3703003B2 (en) 2005-10-05
JP2000299681A (en) 2000-10-24
AU770983B2 (en) 2004-03-11

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Legal Events

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B25A Requested transfer of rights approved

Free format text: FLARION TECHNOLOGIES, INC. (US)

B25A Requested transfer of rights approved

Owner name: QUALCOMM INCORPORATED (US)

Free format text: TRANSFERIDO DE: FLARION TECHNOLOGIES, INC.

B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 12A ANUI DADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2138 DE 27/12/2011.

B15K Others concerning applications: alteration of classification

Ipc: H04L 5/02 (2006.01)